/*
This file is part of Keepass2Android, Copyright 2013 Philipp Crocoll. This file is based on Keepassdroid, Copyright Brian Pellin.

  Keepass2Android is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  Keepass2Android is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with Keepass2Android.  If not, see <http://www.gnu.org/licenses/>.
  */

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text.RegularExpressions;
using Android.App;
using Android.Content;
using Android.Database;
using Android.OS;
using Android.Preferences;
using Android.Provider;
using Android.Views;
using Android.Widget;
using Android.Content.PM;
using Android.Content.Res;
using Android.Graphics;
using Android.Graphics.Drawables;
using Android.Hardware.Display;
using Android.Util;
using Android.Views.InputMethods;
using AndroidX.Core.View;
using AndroidX.Core.View.InputMethod;
using AndroidX.ViewPager2.Widget;
using Google.Android.Material.Dialog;
using KeePass.Util;
using keepass2android;
using KeePassLib;
using KeePassLib.Security;
using KeePassLib.Serialization;
using Org.Apache.Http.Util;
using Uri = Android.Net.Uri;


namespace keepass2android
{
	public class LocaleManager
	{
		public static Context LocalizedAppContext
		{
			get
			{
				//the standard way of setting locale on the app context is through Application.AttachBaseContext,
				//but because of https://bugzilla.xamarin.com/11/11182/bug.html this doesn't work
				return setLocale(Application.Context);
			}
		}
		public static Context setLocale(Context c)
		{
			return setNewLocale(c, getLanguage(c));
		}

		public static Context setNewLocale(Context c, String language)
		{
			return updateResources(c, language);
		}

		static string _language;
		public static string Language 
		{			
			get { return _language; }
			set { _language = value;languageLoaded = true; 
			} 
		}
		static bool languageLoaded = false;

		public static String getLanguage(Context c)
		{
			if (!languageLoaded)
            {
				var langPref = PreferenceManager.GetDefaultSharedPreferences(c).GetString(c.GetString(Resource.String.app_language_pref_key), null);
				Language = LanguageEntry.PrefCodeToLanguage(langPref);
			}			
			return Language;
		}

		private static Context updateResources(Context context, String language)
		{
			if (language == null)
				return context;
			
			Java.Util.Locale locale = new Java.Util.Locale(language);
			Java.Util.Locale.Default = locale;

			Resources res = context.Resources;
			Configuration config = new Configuration(res.Configuration);
			if ((int)Build.VERSION.SdkInt >= 17)
			{
				config.SetLocale(locale);
				context = context.CreateConfigurationContext(config);
			}
			else
			{
				config.Locale = locale;
				res.UpdateConfiguration(config, res.DisplayMetrics);
			}
			return context;

		}
	}

    /// <summary>
	/// A small container/wrapper that helps with the building and sorting of the 
	/// Language Preference list, and interoperability between it and LocaleManager
	/// </summary>
	class LanguageEntry
    {
		// "System language" preference code; maps to LocaleManager.Language = null
        private const string SYS_LANG_CODE = "SysLang";

		// Preference code (2-char lowercase, or SYS_LANG_CODE)
        public readonly string Code;
		// Localized display name
        public readonly string Name;
		// True if this LanguageEntry is the "System language", false otherwise
        public readonly bool IsSystem;

        /// <summary>
		/// Creates a LanguageEntry from a Locale
		/// </summary>
		/// <param name="from"></param>
		/// <returns></returns>
		public static LanguageEntry OfLocale(Java.Util.Locale from)
        {
            return new LanguageEntry(from.Language, from.DisplayLanguage, false);
        }

        /// <summary>
		/// Creates the "System language" LanguageEntry with the given localized display name,
		/// special preference code, marked as a System entry.
		/// </summary>
		/// <param name="displayName"></param>
		/// <returns></returns>
		public static LanguageEntry SystemDefault(string displayName)
        {
            return new LanguageEntry(SYS_LANG_CODE, displayName, true);
        }

        private LanguageEntry(string code, string name, bool isSystem)
        {
            this.Code = code;
            this.Name = name;
            this.IsSystem = isSystem;
        }

        /// <summary>
		/// Converts a language preference code to a code that is compatible with LocaleManager.Language
		/// </summary>
		/// <param name="code"></param>
		/// <returns>A converted code, possibly null</returns>
		public static string PrefCodeToLanguage(string code)
        {
            return string.IsNullOrEmpty(code) || SYS_LANG_CODE.Equals(code) ? null : code;
        }

        public override string ToString()
        {
            return "{" + this.Code + ":" + this.Name + "}";
        }
    }


    public class Util
    {


        public const String KeyFilename = "fileName";
        public const String KeyServerusername = "serverCredUser";
        public const String KeyServerpassword = "serverCredPwd";
        public const String KeyServercredmode = "serverCredRememberMode";


        public static void PutIoConnectionToIntent(IOConnectionInfo ioc, Intent i, string prefix = "")
        {
            i.PutExtra(prefix + KeyFilename, ioc.Path);
            i.PutExtra(prefix + KeyServerusername, ioc.UserName);
            i.PutExtra(prefix + KeyServerpassword, ioc.Password);
            i.PutExtra(prefix + KeyServercredmode, (int)ioc.CredSaveMode);
        }

        public static void SetIoConnectionFromIntent(IOConnectionInfo ioc, Intent i, string prefix = "")
        {
            ioc.Path = i.GetStringExtra(prefix + KeyFilename);
            ioc.UserName = i.GetStringExtra(prefix + KeyServerusername) ?? "";
            ioc.Password = i.GetStringExtra(prefix + KeyServerpassword) ?? "";
            ioc.CredSaveMode = (IOCredSaveMode)i.GetIntExtra(prefix + KeyServercredmode, (int)IOCredSaveMode.NoSave);
        }


        public static string GetErrorMessage(Exception e)
        {
            return ExceptionUtil.GetErrorMessage(e);
        }

        public static Bitmap DrawableToBitmap(Drawable drawable)
        {
            Bitmap bitmap = null;

            if (drawable is BitmapDrawable)
            {
                BitmapDrawable bitmapDrawable = (BitmapDrawable)drawable;
                if (bitmapDrawable.Bitmap != null)
                {
                    return bitmapDrawable.Bitmap;
                }
            }

            if (drawable.IntrinsicWidth <= 0 || drawable.IntrinsicHeight <= 0)
            {
                bitmap = Bitmap.CreateBitmap(1, 1,
                    Bitmap.Config.Argb8888); // Single color bitmap will be created of 1x1 pixel
            }
            else
            {
                bitmap = Bitmap.CreateBitmap(drawable.IntrinsicWidth, drawable.IntrinsicHeight, Bitmap.Config.Argb8888);
            }

            Canvas canvas = new Canvas(bitmap);
            drawable.SetBounds(0, 0, canvas.Width, canvas.Height);

            drawable.Draw(canvas);



            return bitmap;
        }

        public static Bitmap ChangeImageColor(Bitmap sourceBitmap, Color color)
        {
            Bitmap temp = Bitmap.CreateBitmap(sourceBitmap, 0, 0,
                sourceBitmap.Width, sourceBitmap.Height);
            Bitmap resultBitmap = temp.Copy(Bitmap.Config.Argb8888, true);
            Paint p = new Paint();
            ColorFilter filter = new LightingColorFilter(color.ToArgb(), 0);
            p.SetColorFilter(filter);

            Canvas canvas = new Canvas(resultBitmap);
            canvas.DrawBitmap(resultBitmap, 0, 0, p);
            return resultBitmap;
        }


        public static float convertDpToPixel(float dp, Context context)
        {
            Resources resources = context.Resources;
            DisplayMetrics metrics = resources.DisplayMetrics;
            float px = dp * metrics.Density;
            return px;
        }

        public static String GetClipboard(Context context)
        {
            Android.Content.ClipboardManager clipboardManager =
                (ClipboardManager)context.GetSystemService(Context.ClipboardService);
            var clip = clipboardManager.PrimaryClip;
            if (clip != null && clip.ItemCount > 0)
            {
                return clip.GetItemAt(0).CoerceToText(context);
            }

            return "";
        }

        public static void CopyToClipboard(Context context, String text, bool isProtected)
        {
            Android.Content.ClipboardManager clipboardManager =
                (ClipboardManager)context.GetSystemService(Context.ClipboardService);
            ClipData clipData = Android.Content.ClipData.NewPlainText("KP2A", text);
            if (isProtected)
            {
                //ClipDescription.Extras is only available since 24 
                if ((int)Build.VERSION.SdkInt >= 24)
                {
                    var extras = clipData.Description.Extras ?? new Android.OS.PersistableBundle();
                    extras.PutBoolean("android.content.extra.IS_SENSITIVE", true);
                    clipData.Description.Extras = extras;
                }
            }

            clipboardManager.PrimaryClip = clipData;
            if (text == "")
            {
                //on some devices, adding empty text does not seem to work. Try again with some garbage.
                clipData = Android.Content.ClipData.NewPlainText("KP2A", "***");
                clipboardManager.PrimaryClip = clipData;
                //seems to work better on some devices:
                try
                {
                    clipboardManager.Text = text;
                }
                catch (Exception exception)
                {
                    Kp2aLog.LogUnexpectedError(exception);

                }

            }


        }

        private static readonly Regex ARC_DEVICE_PATTERN = new Regex(".+_cheets|cheets_.+");

        public static bool IsChromeOS(Context context)
        {
            return
                context.PackageManager.HasSystemFeature(
                    "org.chromium.arc.device_management") // https://stackoverflow.com/a/39843396/292233
                || (Build.Device != null && ARC_DEVICE_PATTERN.IsMatch(Build.Device))
                ;
        }

        public static void GotoUrl(Context context, String url)
        {
            if (!string.IsNullOrEmpty(url))
            {

                if (url.StartsWith("androidapp://"))
                {
                    string packageName = url.Substring("androidapp://".Length);
                    Intent startKp2aIntent = context.PackageManager.GetLaunchIntentForPackage(packageName);
                    if (startKp2aIntent != null)
                    {
                        startKp2aIntent.AddCategory(Intent.CategoryLauncher);
                        startKp2aIntent.AddFlags(ActivityFlags.NewTask);
                        context.StartActivity(startKp2aIntent);
                    }
                }
                else
                {
                    Uri uri = Uri.Parse(url);
                    context.StartActivity(new Intent(
                        url.StartsWith("tel:") ? Intent.ActionDial : Intent.ActionView,
                        uri));
                }
            }
        }

        public static void GotoUrl(Context context, int resId)
        {
            GotoUrl(context, context.GetString(resId));
        }

        public static void GotoMarket(Context context)
        {
            GotoUrl(context, context.GetString(Resource.String.MarketURL) + context.PackageName);
        }

        public static bool GotoDonateUrl(Context context)
        {
            string donateUrl = context.GetString(Resource.String.donate_url,
                new Java.Lang.Object[]
                {
                    context.Resources.Configuration.Locale.Language,
                    context.PackageName
                });
            try
            {
                GotoUrl(context, donateUrl);
                return true;
            }
            catch (ActivityNotFoundException)
            {
                App.Kp2a.ShowMessage(context, Resource.String.error_failed_to_launch_link,  MessageSeverity.Error);
                return false;
            }

        }

        public static String GetEditText(Activity act, int resId)
        {
            TextView te = (TextView)act.FindViewById(resId);
            System.Diagnostics.Debug.Assert(te != null);

            if (te != null)
            {
                return te.Text;
            }
            else
            {
                return "";
            }
        }

        public static void SetEditText(Activity act, int resId, String str)
        {
            TextView te = (TextView)act.FindViewById(resId);
            System.Diagnostics.Debug.Assert(te != null);

            if (te != null)
            {
                te.Text = str;
            }
        }

        /**
     * Indicates whether the specified action can be used as an intent. This
     * method queries the package manager for installed packages that can
     * respond to an intent with the specified action. If no suitable package is
     * found, this method returns false.
     *
     * @param context The application's environment.
     * @param action The Intent action to check for availability.
     *
     * @return True if an Intent with the specified action can be sent and
     *         responded to, false otherwise.
     */
        static bool IsIntentAvailable(Context context, String action, String type, List<String> categories)
        {
            PackageManager packageManager = context.PackageManager;
            Intent intent = new Intent(action);
            if (type != null)
                intent.SetType(type);
            if (categories != null)
                categories.ForEach(c => intent.AddCategory(c));
            IList<ResolveInfo> list =
                packageManager.QueryIntentActivities(intent,
                    PackageInfoFlags.MatchDefaultOnly);
            foreach (ResolveInfo i in list)
                Kp2aLog.Log(i.ActivityInfo.ApplicationInfo.PackageName);
            return list.Count > 0;
        }

        /// <summary>
        /// Opens a browse dialog for selecting a file.
        /// </summary>
        /// <param name="activity">context activity</param>
        /// <param name="requestCodeBrowse">requestCode for onActivityResult</param>
        /// <param name="forSaving">if true, the file location is meant for saving</param>
        /// <param name="tryGetPermanentAccess">if true, the caller prefers a location that can be used permanently
        /// This means that ActionOpenDocument should be used instead of ActionGetContent (for not saving), as ActionGetContent
        /// is more for one-time access, but therefore allows possibly more available sources.</param>
        public static void ShowBrowseDialog(Activity activity, int requestCodeBrowse, bool forSaving,
            bool tryGetPermanentAccess)
        {
            //even though GetContent is not well supported (since Android 7, see https://commonsware.com/Android/previews/appendix-b-android-70) 
            //we still offer it.
            var loadAction = (tryGetPermanentAccess && IsKitKatOrLater)
                ? Intent.ActionOpenDocument
                : Intent.ActionGetContent;
            if ((!forSaving) &&
                (IsIntentAvailable(activity, loadAction, "*/*", new List<string> { Intent.CategoryOpenable })))
            {
                Intent i = new Intent(loadAction);
                i.SetType("*/*");
                i.AddCategory(Intent.CategoryOpenable);

                activity.StartActivityForResult(i, requestCodeBrowse);
            }
            else
            {
                if ((forSaving) && (IsKitKatOrLater))
                {
                    Intent i = new Intent(Intent.ActionCreateDocument);
                    i.SetType("*/*");
                    i.AddCategory(Intent.CategoryOpenable);

                    activity.StartActivityForResult(i, requestCodeBrowse);
                }
                else
                {
                    string defaultPath = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;

                    ShowInternalLocalFileChooser(activity, requestCodeBrowse, forSaving, defaultPath);
                }

            }
        }

        public static bool IsKitKatOrLater
        {
            get { return (int)Build.VERSION.SdkInt >= 19; }
        }


        public static PendingIntentFlags AddMutabilityFlag(PendingIntentFlags flags, PendingIntentFlags mutability)
        {
            if ((int)Build.VERSION.SdkInt >= 31)
                return flags | mutability;
            else return flags;
        }

        private static void ShowInternalLocalFileChooser(Activity act, int requestCodeBrowse, bool forSaving,
            string defaultPath)
        {

#if !EXCLUDE_FILECHOOSER
            string fileProviderAuthority = act.PackageName + ".android-filechooser.localfile";

            Intent i = Keepass2android.Kp2afilechooser.Kp2aFileChooserBridge.GetLaunchFileChooserIntent(act,
                fileProviderAuthority,
                defaultPath);
            if (forSaving)
                i.PutExtra("group.pals.android.lib.ui.filechooser.FileChooserActivity.save_dialog", true);

            act.StartActivityForResult(i, requestCodeBrowse);
#else
			App.Kp2a.ShowMessage(act, "File Chooser excluded!", MessageSeverity.Error);
#endif
        }

        /// <summary>
        /// Tries to extract the filename from the intent. Returns that filename or null if no success
        /// (e.g. on content-URIs in Android KitKat+). 
        /// Guarantees that the file exists.
        /// </summary>
        public static string IntentToFilename(Intent data, Context ctx)
        {
            string s = GetFilenameFromInternalFileChooser(data, ctx);
            if (!String.IsNullOrEmpty(s))
                return s;

            try
            {
                Uri uri = data.Data;
                if ((uri != null) && (uri.Scheme == "content"))
                {
                    String[] col = new String[] { MediaStore.MediaColumns.Data };

                    ICursor c1 = ctx.ContentResolver.Query(uri, col, null, null, null);
                    c1.MoveToFirst();

                    var possibleFilename = c1.GetString(0);
                    if (File.Exists(possibleFilename))
                        return possibleFilename;
                }
            }
            catch (Exception e)
            {
                Kp2aLog.LogUnexpectedError(e);
            }

            String filename = data.Data.Path;
            if ((String.IsNullOrEmpty(filename) || (!File.Exists(filename))))
                filename = data.DataString;
            if (File.Exists(filename))
                return filename;
            //found no valid file
            return null;
        }

        public static string GetFilenameFromInternalFileChooser(Intent data, Context ctx)
        {
#if !EXCLUDE_FILECHOOSER
            string EXTRA_RESULTS = "group.pals.android.lib.ui.filechooser.FileChooserActivity.results";
            if (data.HasExtra(EXTRA_RESULTS))
            {
                IList uris = data.GetParcelableArrayListExtra(EXTRA_RESULTS);
                Uri uri = (Uri)uris[0];
                {
                    return Group.Pals.Android.Lib.UI.Filechooser.Providers.BaseFileProviderUtils.GetRealUri(ctx, uri)
                        .ToString();
                }
            }

#endif
            return null;
        }


        public static bool HasActionBar(Activity activity)
        {
            //Actionbar is available since 11, but the layout has its own "pseudo actionbar" until 13
            return ((int)Android.OS.Build.VERSION.SdkInt >= 14) && (activity.ActionBar != null);
        }

        public delegate bool FileSelectedHandler(string filename);



        public class DismissListener : Java.Lang.Object, IDialogInterfaceOnDismissListener
        {
            private readonly Action _onDismiss;

            public DismissListener(Action onDismiss)
            {
                _onDismiss = onDismiss;
            }

            public void OnDismiss(IDialogInterface dialog)
            {
                _onDismiss();
            }
        }


        class CancelListener : Java.Lang.Object, IDialogInterfaceOnCancelListener
        {
            private readonly Action _onCancel;

            public CancelListener(Action onCancel)
            {
                _onCancel = onCancel;
            }

            public void OnCancel(IDialogInterface dialog)
            {
                _onCancel();
            }
        }

        public static void ShowFilenameDialog(Activity activity, Func<string, Dialog, bool> onOpen,
            Func<string, Dialog, bool> onCreate, Action onCancel, bool showBrowseButton, string defaultFilename,
            string detailsText, int requestCodeBrowse)
        {
            MaterialAlertDialogBuilder builder = new MaterialAlertDialogBuilder(activity);
            builder.SetView(activity.LayoutInflater.Inflate(Resource.Layout.file_selection_filename, null));

            if (onCancel != null)
                builder.SetOnCancelListener(new CancelListener(onCancel));
            Dialog dialog = builder.Create();
            dialog.Show();

            Button openButton = (Button)dialog.FindViewById(Resource.Id.open);
            Button createButton = (Button)dialog.FindViewById(Resource.Id.create);

            TextView enterFilenameDetails = (TextView)dialog.FindViewById(Resource.Id.label_open_by_filename_details);
            openButton.Visibility = onOpen != null ? ViewStates.Visible : ViewStates.Gone;
            createButton.Visibility = onCreate != null ? ViewStates.Visible : ViewStates.Gone;
            // Set the initial value of the filename
            EditText editFilename = (EditText)dialog.FindViewById(Resource.Id.file_filename);
            editFilename.Text = defaultFilename;
            enterFilenameDetails.Text = detailsText;
            enterFilenameDetails.Visibility = enterFilenameDetails.Text == "" ? ViewStates.Gone : ViewStates.Visible;

            // Open button
            if (onOpen != null)
                openButton.Click += (sender, args) =>
                {
                    String fileName = ((EditText)dialog.FindViewById(Resource.Id.file_filename)).Text;
                    if (onOpen(fileName, dialog))
                        dialog.Dismiss();
                };

            // Create button
            if (onCreate != null)
                createButton.Click += (sender, args) =>
                {
                    String fileName = ((EditText)dialog.FindViewById(Resource.Id.file_filename)).Text;
                    if (onCreate(fileName, dialog))
                        dialog.Dismiss();
                };

            Button cancelButton = (Button)dialog.FindViewById(Resource.Id.fnv_cancel);
            cancelButton.Click += delegate
            {
                dialog.Dismiss();
                if (onCancel != null)
                    onCancel();
            };

            ImageButton browseButton = (ImageButton)dialog.FindViewById(Resource.Id.browse_button);
            if (!showBrowseButton)
            {
                browseButton.Visibility = ViewStates.Invisible;
            }

            browseButton.Click += (sender, evt) =>
            {
                string filename = ((EditText)dialog.FindViewById(Resource.Id.file_filename)).Text;

                Util.ShowBrowseDialog(activity, requestCodeBrowse,
                    onCreate != null, /*TODO should we prefer ActionOpenDocument here?*/ false);

            };

        }

        public static void QueryCredentials(IOConnectionInfo ioc, Action<IOConnectionInfo> afterQueryCredentials,
            Activity activity)
        {
            //Build dialog to query credentials:
            MaterialAlertDialogBuilder builder = new MaterialAlertDialogBuilder(activity);
            builder.SetTitle(activity.GetString(Resource.String.credentials_dialog_title));
            builder.SetPositiveButton(activity.GetString(Android.Resource.String.Ok), (dlgSender, dlgEvt) =>
            {
                Dialog dlg = (Dialog)dlgSender;
                string username = ((EditText)dlg.FindViewById(Resource.Id.cred_username)).Text;
                string password = ((EditText)dlg.FindViewById(Resource.Id.cred_password)).Text;
                int credentialRememberMode =
                    ((Spinner)dlg.FindViewById(Resource.Id.cred_remember_mode)).SelectedItemPosition;
                ioc.UserName = username;
                ioc.Password = password;
                ioc.CredSaveMode = (IOCredSaveMode)credentialRememberMode;
                afterQueryCredentials(ioc);
            });
            builder.SetView(activity.LayoutInflater.Inflate(Resource.Layout.url_credentials, null));
            builder.SetNeutralButton(activity.GetString(Android.Resource.String.Cancel),
                (dlgSender, dlgEvt) => { });
            Dialog dialog = builder.Create();
            dialog.Show();
            ((EditText)dialog.FindViewById(Resource.Id.cred_username)).Text = ioc.UserName;
            ((EditText)dialog.FindViewById(Resource.Id.cred_password)).Text = ioc.Password;
            ((Spinner)dialog.FindViewById(Resource.Id.cred_remember_mode)).SetSelection((int)ioc.CredSaveMode);
        }


        public static void FinishAndForward(Activity activity, Intent i)
        {
            i.SetFlags(ActivityFlags.ForwardResult);
            activity.StartActivity(i);
            activity.Finish();
        }

        public static void PrepareDonateOptionMenu(IMenu menu, Context ctx)
        {
            var donateItem = menu.FindItem(Resource.Id.menu_donate);
            if (donateItem != null)
            {
                donateItem.SetVisible(
                    !PreferenceManager.GetDefaultSharedPreferences(ctx)
                        .GetBoolean(ctx.GetString(Resource.String.NoDonateOption_key), false)
                );
            }
        }


        public static bool GetCloseDatabaseAfterFailedBiometricQuickUnlock(Context ctx)
        {
            return (PreferenceManager.GetDefaultSharedPreferences(ctx).GetBoolean(
                ctx.GetString(Resource.String.CloseDatabaseAfterFailedBiometricQuickUnlock_key), true));

        }



        public class InsetListener: Java.Lang.Object, IOnApplyWindowInsetsListener
        {
            private View _targetView;
            private readonly int _insetsType;
            private int _initialPaddingLeft;
            private int _initialPaddingTop;
            private int _initialPaddingRight;
            private int _initialPaddingBottom;
            

            public bool EnabledPaddingLeft { get; set; } = true;
            public bool EnablePaddingTop { get; set; } = true;
            public bool EnablePaddingRight { get; set; } = true;
            public bool EnablePaddingBottom { get; set; } = true;

            public InsetListener(View targetView, int insetsType)
            {
                _targetView = targetView;
                _insetsType = insetsType;
                _initialPaddingLeft = targetView.PaddingLeft;
                _initialPaddingTop = targetView.PaddingTop;
                _initialPaddingRight = targetView.PaddingRight;
                _initialPaddingBottom = targetView.PaddingBottom;
            }

            public InsetListener(View targetView): this(targetView,  WindowInsetsCompat.Type.SystemBars())
            {
                

            }

            public WindowInsetsCompat OnApplyWindowInsets(View v, WindowInsetsCompat insets)
            {
                var systemBarsInsets = insets.GetInsets(_insetsType);

                _targetView.SetPadding(
                    _initialPaddingLeft + (EnabledPaddingLeft ? systemBarsInsets.Left : 0),
                    _initialPaddingTop + (EnablePaddingTop ? systemBarsInsets.Top : 0),
                    _initialPaddingRight + (EnablePaddingRight ? systemBarsInsets.Right : 0),
                    _initialPaddingBottom + (EnablePaddingBottom ? systemBarsInsets.Bottom : 0)
                );


                return insets; 
            }

            public static InsetListener ForBottomElement(View view)
            {
                return new InsetListener(view, WindowInsetsCompat.Type.Ime() | WindowInsetsCompat.Type.SystemBars() | WindowInsetsCompat.Type.DisplayCutout())
                {
                    EnablePaddingTop = false
                };
            }
            public static InsetListener ForTopElement(View view)
            {
                return new InsetListener(view,  WindowInsetsCompat.Type.SystemBars() | WindowInsetsCompat.Type.DisplayCutout())
                {
                    EnablePaddingBottom = false
                };
            }

            public void Apply()
            {
                ViewCompat.SetOnApplyWindowInsetsListener(_targetView, this);

            }
        }

        public static void MoveBottomBarButtons(int btn1Id, int btn2Id, int bottomBarId, Activity context)
        {
            var btn1 = context.FindViewById<Button>(btn1Id);
            var btn2 = context.FindViewById<Button>(btn2Id);
            var rl = context.FindViewById<RelativeLayout>(bottomBarId);
            rl.ViewTreeObserver.GlobalLayout += (sender, args) =>
            {
                if (btn1.Width + btn2.Width > rl.Width)
                {
                    btn2.SetPadding(btn2.PaddingLeft, (int)Util.convertDpToPixel(40, context), btn2.PaddingRight,
                        btn2.PaddingBottom);
                }
            };
        }

        public static MemoryStream StreamToMemoryStream(Stream stream)
        {

            var memoryStream = stream as MemoryStream;
            if (memoryStream == null)
            {
                // Read the stream into memory
                int capacity = 4096; // Default initial capacity, if stream can't report it.
                if (stream.CanSeek)
                {
                    capacity = (int)stream.Length;
                }

                memoryStream = new MemoryStream(capacity);
                stream.CopyTo(memoryStream);
                stream.Close();
                memoryStream.Seek(0, SeekOrigin.Begin);
            }

            return memoryStream;

        }

        public static Bitmap MakeLargeIcon(Bitmap unscaled, Context context)
        {
            int height =
                (int)(0.9 * context.Resources.GetDimension(Android.Resource.Dimension.NotificationLargeIconHeight));
            int width = (int)(0.9 *
                              context.Resources.GetDimension(Android.Resource.Dimension.NotificationLargeIconWidth));
            return Bitmap.CreateScaledBitmap(unscaled, width, height, true);
        }

        public static string GetProtocolId(IOConnectionInfo ioc)
        {
            string displayPath = App.Kp2a.GetFileStorage(ioc).GetDisplayName(ioc);
            int protocolSeparatorPos = displayPath.IndexOf("://", StringComparison.Ordinal);
            string protocolId = protocolSeparatorPos < 0 ? "file" : displayPath.Substring(0, protocolSeparatorPos);
            return protocolId;
        }

        public static void MakeSecureDisplay(Activity context)
        {
            if (SecureDisplayConfigured(context) && !PreferenceManager.GetDefaultSharedPreferences(context)
                    .GetBoolean("no_secure_display_check", false))
            {
                var hasUnsecureDisplay = HasUnsecureDisplay(context);
                if (hasUnsecureDisplay)
                {
                    Kp2aLog.Log("Display is not secure");
                    var intent = new Intent(context, typeof(NoSecureDisplayActivity));
                    intent.AddFlags(ActivityFlags.SingleTop | ActivityFlags.ClearTop);
                    context.StartActivityForResult(intent, 9999);
                }
                Kp2aLog.Log("Setting FLAG_SECURE.");
                context.Window.SetFlags(WindowManagerFlags.Secure, WindowManagerFlags.Secure);
            }
            else Kp2aLog.Log("Secure display disabled by user preference.");
        }

        public static bool SecureDisplayConfigured(Activity context)
        {
            return PreferenceManager.GetDefaultSharedPreferences(context).GetBoolean(
                context.GetString(Resource.String.ViewDatabaseSecure_key), true);
        }

        public static bool HasUnsecureDisplay(Activity context)
        {
            bool hasUnsecureDisplay = false;
            if ((int)Build.VERSION.SdkInt >= 17)
            {
                foreach (var display in ((DisplayManager)context.GetSystemService(Context.DisplayService))
                         .GetDisplays())
                {
                    if ((display.Flags & DisplayFlags.Secure) == 0)
                    {
                        hasUnsecureDisplay = true;
                    }
                }
            }

            return hasUnsecureDisplay;
        }

        public static void SetNoPersonalizedLearning(EditText editText)
        {
            if (editText == null)
                return;
            if ((int)Build.VERSION.SdkInt >= 26)
                editText.ImeOptions = (ImeAction)EditorInfoCompat.ImeFlagNoPersonalizedLearning;
            ;

        }

        public static void SetNoPersonalizedLearning(View view)
        {
            if (view is ViewGroup vg)
            {
                for (int i = 0; i < vg.ChildCount; i++)
                {
                    SetNoPersonalizedLearning(vg.GetChildAt(i));
                }
            }

            if (view is EditText editText)
            {
                SetNoPersonalizedLearning(editText);
            }
        }

        public static void SetNextFreeUrlField(PwEntry entry, string url)
        {
            string prefix = url.StartsWith(KeePass.AndroidAppScheme) ? "AndroidApp" : "KP2A_URL_";
            int c = 1;
            while (entry.Strings.Get(prefix + c) != null)
            {
                c++;
            }

            entry.Strings.Set(prefix + c, new ProtectedString(false, url));
        }
    }
}

